/*
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package com.amazon.node;

/**
 *
 * @author Salman Noor, Shcool of Electrical and Information Engineering
 * @Copyright: Wits University 2013 - All Rights Reserved
 * @email salmannoor74415@gmail.com
 * @License BSD License (http://www.linfo.org/bsdlicense.html)
 */
abstract public class Node {
    protected String nodeValue;
    
    public abstract String getValue();
    public abstract void setValue(String value);
    public abstract Integer evaluate();
}
